CDKN2A and type 2 diabetes mellitus: Soon afterward, three collaborating groups: Wellcome Trust Case Control Consortium (WTCCC), Finland-United States Investigation of NIDDM Genetics group (FUSION), and Diabetes Genetics Initiative (DGI) replicated previous GWAS results and independently discovered additional associations at CDKAL1, IGF2BP2, and CDKN2A/B [12].